Signaling and telephone system.



H. 0. RUGH.

SIGNALING AND TELEPHONE SYSTEM.

APPLICATION FILED PER-15, 1910.

Patented Jan. 30, 1912.

I a 63W) W5 full, clear,

I, for telephonic transmission, a clear, c1 rcu1t for this work,

' strumentalities 7 features thereon, so as to call a station, an Y 35 UNITED STATES PATENT OFFICE.

HARRY O. RUGH, OF SANDWICH, ILLINOIS, ASSIGNOR TO SANDWICH ELECTRIC COM.-

PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS. I

SIGNALING AND TELEPHONE SYSTEM.

Specification of Letters Patent. Original application filed June 26, 1908, Serial No. 440,571. Divided and Patented Jan. 30,1912. this application filed February 15,

1910. Serial No. 543,969-

7 To all whom 2'2) may con'cem:

' Be it known that I, HARRY O. RUGH, citizen of the United States, residing at Sandwich, in the county of Dekalb and State of 5 Illinois, hav'einvented a certain new and usefulImprovement in Signaling and Telephone Systems, of which the following is a concise, and exact description, reference being had to the accompanying l0 drawings, forming a part of this specification. My invention relates to signaling and telephone systems, and is a divlsional application of application, Serial No. 440,571, filed June 26, 1908;

In the application of which this is a division, I show and claim a plurality. .of circuits whichqare adapted for telephone and telegraph use, and in which one circuit is adapted to carry selec-tiye signaling appliances, in connectionwith telegraphic appliances in connection with local or block telephone circuits, and in which the other cir cuit is adapted to be clear and to be provided with telephonic appliances, which are brought into use when the selective call is brought over the first-aforesaid circuit.-

In the presentapplication I- set forth and claim two circuits, one of which is adapted so as to provide and the other circuit of which is to be provided with inhaving selective callin the telephone on the other circuit may be used, and in which the circuit carrying the selective calling devices isat the same time enabled to carry on block or inter-station telephone service.

I will describe my invention more in deail by reference to the accompanyingdrawing illustrating the thereof, in. which- Figure 1 illustrates diagrammatically circuits, and Fig. 2 shows in detail the selective calling mechanism.

Referring more particularly to Fig. 1-, I show a circuit consisting of the line. wire 1, grounded at its extremities, and a second circuit, 2, likewise grounded at its extremities through suitable instrumentalities, as will hereinafter appear. I have shown the (antral station A, and substations B, C and through all "signed to deliver positive preferred embodiment the- ' of the battery illustrative of a plurality of stations. -thefarmature 22 Theobject of my invention is to provide a good telephonic circuit, and this is the circuit consisting of the line wire I, which goes 7 of the stations, and which is provided in this particular instance at each station with a jack 3, which jack is connected for use with a plug 4, which plug has connected to it, in a metallic circuit, the receiver 5, induction coil 6, transmitter 7, battery 8, condenser 9, generator 10, and the switch-hook 11. Each jack 3 is grounded as shown, because in this application the conductor 1 is illustrated as being grounded, although, of course, the grounded feature forms no portion of the invention, vit being used merely for the sake of clearness.- At the despat-chers station, appliances are similar, with the exception that the generator 10 is omitted.-

. At the central station there are provided two generators, preferably 12 and 13, deand negative current, which. generators, asshown, are

grounded and cont-rolled by two keys, 14

and 15, so'that positive-and negative current may be' sent over the line circuit 2,

with which these aforesaid appliances are associated. These keys are used to operate selective calling devices 16 at the various substations, which selective calling appliances are shown in detail in Fig. 2, wherein a polar relay 17 is shown serially included w1th a line wire 2, and, depending upon the.

polarity of the current, contacts with either contact point, 18 or 19, the spring 20 holding the armature normally away from both cont-acts. A battery 21 is connected to the central portion of the armature 22. When impulses are sent over the line wire, so that the contact 18 is included in circuit, mag;

net 23 operates to step up theimpulse mechanism 24, which, when wholly stepped up,

closes circuit with the spring 25, thereby closing circuit through the battery 26 and relay 27, to actuate the signal 28 by means It will of coursebe understood that the arms are placed at diflerent angular positions in the different stations, so that different stations respond to different numbers of stepping-up impulses. When the signal calling operation is complete, a nega- A, the telephonictive' 1mpulse is sent over theline, so that, R

contacts" with a contact-19,

to close circuit through the magnet 31, thereby to release the locking pawl 32 and the step-up arm 33 to allow the element 24 to return to its normal or zero position, a stop 34: being provided for this purpose.

It will thus be seen that through the in strumentalities thus far described, central station A can call any of the substations, and when so called, the substation operator has instructions to insert plug 4 into jack 3, and to talk to the train despatcher over the clear circuit 1, it being of the utmost importance that a cleartrain despatchers circuitbe at 'all times maintained. I provide further instrumentalities so that the interstation telephonic service can be carried on, for instance, between stations B and C, and if sufiicient telephonic appliances are at hand, likewise between stations 13 and A; and to this end the central station A has a jack 35, which finds its mate in the jack 35 at the station B, and stations B and C have jacks 36, which are adapted for conjoint use, and stations C and D have jacks 37 which are adapted for conjoint use. The jacks 35, 36 and 37 of course accommo- -date the plugs 4. At each station there are shown lneans for controlling the inter-sta-' tion telephonic service, and this is done in this particular instance through the agency of the quadrilateral resistances, consisting of the two resistance coils 38, and the two impedance coils 39, which are shown throughout all of the stations, each station having two quadrilateral resistances. Condensers 40 are also provided to conduct the talking currents to ground. Magneto bells 41 are provided at each of the substations to respond to the generators 10, when called for interstation service. The interstation talking circuit, for instance, between stations B and C, will be as follows: from the right hand condenser 40 of stations lined, at least, in sufiicient measure'to pre- .6 vent commercial disturbance, the reason being that no telephoniccurre'nts can pass serially through all the branches of said quadrilateral resistance, as will be apparent to those skilled in the art. Thus, telephonic currents passing over the circuits just outlined will be stopped from going farther by the left-hand quadrilateral resistance of the station B, and the right hand quadrilateral resistance of the station C. The direct current impulses, of course, can pass through these resistances, as they are not sufficiently rapid to be largely deflected. In this connection, it might be stated that, relay 27, of course, is a slowacting relay. I thus attain a clear dcspatchers circuit by loading the circuit 2 with the selective calling features,

and yet, at the same time, secure inter-station block telephone service, if so desired, over the circuit 2, the circuit 1 being for the exclusive use of the despatcher.

WVhile I have herein shown and particularly described the preferred embodiment of my invention, I do not desire to limit myself to the precise construction and arrangement herein set forth, but

Having thus described the salient features of my invention, what I claim as new and desire to secure by Letters Patent is:

1. A system of the character described comprising a central station and a plurality l of substations, a telephone set at'each sta tion, a line circuit uniting said stations, to

which said telephones are adapted for connection, a second line circuit uniting all of 1 said stations, a selective signal-receiving dey vice including a slgnal associated with said second line circuit at each station, and means, at the central station for selectingand opcrating the signal of any station independv ently of said first aforesaid line circuit.

2. -A system of the character described comprising a central station and a plurality of substations, two separate line circuits for uniting all of said stations, one ine circuit torserve as a talking circuit and the other line circuit to serve as a signaling circuit; a telephone set at each substation for connection to the talklng circult; a selective s1gnalreceiving device including a signal at each, substation to notify the operator thereat that he is wanted at the telephone associated with the said station, and means at the cen tral station to selectively operate either se-.

lective signal-receiving device and its associ ated signal independently of-the talking circuit.

3.- A system of the character described comprising a central station and a plurality of substations, a telephone set at each station, a line circuit uniting said stations, to which said telephones are adapted for connection, a second line circuit uniting all of said stations, means for connecting said telephonesto said second line circuit, a selective signal-receiving device including a signal associated with said second line circuit at each station, and means at the central station for selecting and operating the signal of any station independently of said first aforesaid line circuit.

4A system'of the character described v ccmprls ,tion,

I phones t0 said second line circuit, means 'int'erposed 1n said second line eircuit to'lir'm't Itelephone c Lciep g a centi'el-taficn and a pInraHty nection, a. sec0nd:1ine ci1 cuit uniting all of sald stat1 0 ns means oi-connecting 'sald teleonversations between adj acent WitnesSesz' stat1o ns,"a. -select1ye .slgnal recelvmg device I assocmted. wlth saldsecond hne circuit'at.-

each station, and means at the cent i'al sta- 7 tion for' selectively calling either station pversaid line circuit,

In witness whereof, I hereunto subscribe 15 my name this 1st day of February A, D.,

"HARRY. 0. RUGH.

'-MAX W. ZABEL, J. ELLIOTT.

" i conic lfoi ithii pa tent may be obtalnci for flvecents-each, by addressing the Commissioner of Patents.

Washington, D. 0. 

